Duan Yuwen, McKay Aaron, Jovanovic Nemanja, Ams Martin, Marshall Graham D, Steel M J, Withford Michael J
MQ Photonics Research Centre, Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), Department of Physics & Astronomy, Macquarie University, NSW 2109, Australia.
Opt Express. 2013 Jul 29;21(15):17701-10. doi: 10.1364/OE.21.017701.
We present a model for a Yb-doped distributed Bragg reflector (DBR) waveguide laser fabricated in phosphate glass using the femtosecond laser direct-write technique. The model gives emphasis to transverse integrals to investigate the energy distribution in a homogenously doped glass, which is an important feature of femtosecond laser inscribed waveguide lasers (WGLs). The model was validated with experiments comparing a DBR WGL and a fiber laser, and then used to study the influence of distributed rare earth dopants on the performance of such lasers. Approximately 15% of the pump power was absorbed by the doped "cladding" in the femtosecond laser inscribed Yb doped WGL case with the length of 9.8 mm. Finally, we used the model to determine the parameters that optimize the laser output such as the waveguide length, output coupler reflectivity and refractive index contrast.
我们提出了一种使用飞秒激光直写技术在磷酸盐玻璃中制造的掺镱分布布拉格反射器（DBR）波导激光器模型。该模型着重于横向积分，以研究均匀掺杂玻璃中的能量分布，这是飞秒激光写入波导激光器（WGL）的一个重要特征。通过将DBR WGL与光纤激光器进行比较的实验对该模型进行了验证，然后用于研究分布稀土掺杂剂对此类激光器性能的影响。在长度为9.8毫米的飞秒激光写入掺镱WGL情况下，约15%的泵浦功率被掺杂的“包层”吸收。最后，我们使用该模型来确定优化激光输出的参数，如波导长度、输出耦合器反射率和折射率对比度。
